Who was the first researcher to produce a transgenic mammal using mice?

The first researcher to produce a transgenic mammal using mice was Rudolf Jaenisch. This groundbreaking work was accomplished in the early 1980s when Jaenisch successfully introduced foreign DNA into mouse embryos, leading to the birth of mice that carried the new genetic material. This landmark achievement laid the foundation for the field of genetic engineering and has had significant implications for biotechnology and medicine.

Jaenisch's research demonstrated the potential for altering genetic traits in mammals, and it opened doors to further advancements in genetic research, including the development of models for studying diseases and the potential for gene therapy. His work is recognized as a pivotal moment in the field of genetics, making it an essential topic in the study of veterinary medicine and applications.